LaMotte SMART3 Colorimeter - Manual (Page 242)

PROCEDURE–LOW RANGE
A. PREPARATION OF HR REAGENT
NOTE: The quantity of Indigo Blue Stock solution (3989) supplied will prepare one
batch of HR Reagent for the High Range Ozone procedure or fi ve batches of HR
Reagent for the Low Range Ozone procedure.
1. Use the 50 mL graduated cylinder to carefully add 45 mL of *Ozone Buffer
(3991) to amber glass bottle marked HR Reagent (3989-MT).
2. Use the 5 mL transfer pipet (0329) and pump (30527) to add 5 mL of Indigo
Blue Stock Solution (3989) to the amber glass bottle. Cap and mix.
B. DETERMINATION OF OZONE
3. Use the 1.0 mL transfer pipet (2-2170) and pump (30527) to add 1.0 mL of HR
Reagent (3989) to each of 2 clean tubes (0290).
4. If chlorine is present add 3 drops Chlorine Inhibitor (3990) to each tube. Cap
tubes.
5. Take one of the prepared tubes (0290) and sampling apparatus (0681) to
sampling site.
6. Lower end of tubing of sampling apparatus to desired depth. Slowly withdraw
and depress plunger several times to purge syringe and tubing. Slowly
withdraw plunger to fi ll purged syringe.
7. Remove plastic tubing from syringe. Remove cap from the prepared tube.
Place tip of syringe against inside of the prepared tube. Slowly depress plunger
and fi ll to the 10 mL line and cap. This is the Sample Tube.
NOTE: DO NOT SHAKE OR INVERT THE SAMPLE.
8. Fill the second prepared tube (0290) to the 10 mL line with ozone free water.
This is the Reagent Blank.
9. Press and hold until colorimeter turns on.
10. Press ENTER to select TESTING MENU.
11. Select ALL TESTS (or another sequence containing 071 Ozone LR) from
TESTING MENU.
12. Scroll to and select 071 Ozone LR from menu.
13. Insert the Reagent Blank tube into chamber, close lid and select SCAN
BLANK.
14. Insert reacted Sample Tube into chamber, close lid and select SCAN SAMPLE.
Record result.
15. Press to turn colorimeter off or press
EXIT
to exit to a previous menu or
make another menu selection.
NOTE: HR Reagent must be made fresh each week. If reagent is refrigerated, it
may be kept up to 3 weeks.
OZONE, Indigo SMART3 Test Procedures 11.11
Test P
rocedures